Why Old Homes Feel Draughty

Older UK homes were built to breathe. Sash windows, open chimneys and suspended timber floors were all designed with ventilation in mind, long before central heating and modern insulation became the norm. What was once sensible design now feels like a persistent cold draught around the ankles on a January evening.

If you heat with wood, this matters even more. A stove works best in a room that holds its warmth, and a constant trickle of cold air makes the fire work harder for less comfort. The good news is that most draughts come from a handful of predictable places, and you can deal with many of them yourself in a weekend or two.

Windows and Doors: The Everyday Gaps

Start where you feel the cold most often. On sash windows, the main culprits are the gaps between the sashes and the frame, and the meeting rail where the top and bottom sashes overlap. On casement windows, it is usually the seal around the opening edge.

• Brush strips or a thin bead of silicone sealant along the meeting rail and sash edges.
• Foam or rubber draught strips around the opening casement, replaced every few years as they compress.
• Adjust sash weights and catches so windows close tightly against the frame rather than rattling.
• External doors: a brush or wiper strip at the bottom, foam or sealant around the frame, and a cover over the keyhole.
• Letterboxes: a brush or flap with a draught-excluding plate fitted behind it.

For external doors, a good quality draught excluder plus a door brush can make a surprising difference. Check that the door sits square in the frame — a sagging hinge lets in more air than any missing strip.

Chimneys and Fireplaces

An open chimney is essentially a hole in your roof, and it will pull warm air out of the room all day long. If you have an open fire you no longer use, or a fireplace that has been blocked off but left open, this is often the single biggest draught in the house.

• Chimney balloon or a purpose-made draught excluder for unused flues — remember to remove it before lighting a fire.
• Chimney cap or cowl to reduce downdraughts and keep rain out.
• Register plate and a sealed closure if the fireplace is no longer in use.
• Keep the stove door closed while the fire is burning, and close the air controls once the fire has died down.

A word of caution: a wood stove needs a permanent air supply to burn safely and efficiently. Never block a purpose-provided ventilation grille, and if you are unsure whether your stove has enough air, ask a registered installer to check it.

Floors, Skirting and Other Sneaky Gaps

Suspended timber floors are a classic source of cold draughts in older homes. Air comes up between the floorboards and through the gap where the skirting meets the floor.

• Fill gaps between floorboards with flexible wood filler or thin slivers of timber.
• Run a bead of sealant, or fit a small moulding, along the bottom of skirting boards.
• Insulate beneath the floor if you can access it — even a simple layer of mineral wool between the joists helps.
• Check gaps around pipework, cables and old redundant vents, and seal them with an appropriate filler.

Don't forget internal doors to unheated spaces such as hallways, cellars and conservatories. A simple draught excluder and keeping doors closed can stop cold air moving through the house.

Ventilation: Don't Seal Everything

Draught-proofing works best alongside sensible ventilation, not instead of it. Older homes need some air movement to manage moisture, and wood burners need a reliable air supply. Sealing every gap can lead to condensation, damp and poor indoor air quality.

• Keep trickle vents open where they are fitted.
• Use extractor fans in kitchens and bathrooms.
• Open windows briefly each day to purge moisture rather than leaving them ajar all day.
• Never block a permanent air vent serving a stove or open fire.

If you notice heavy condensation on windows or a musty smell, you have probably gone too far. Reopen a small vent or leave an internal door slightly ajar.

What to Do First

If you want the biggest improvement for the least effort, work in this order:

• Block the chimney when it isn't in use.
• Draught-proof external doors and the letterbox.
• Seal the worst window gaps, especially in rooms you use most.
• Deal with floorboards and skirting in the coldest rooms.
• Fit thermal curtains and close them at dusk.

None of these jobs need to be expensive or complicated, and most can be done with materials from a local hardware shop. A warmer, calmer home — and a stove that heats the room rather than the sky — is well within reach.